In order to receive updates quicker than others, you need to enable beta versions of the software in Google Play
As beta testers, please make sure you have a recent backup of the masterseed and all private keys inside Mycelium. Beta testers will experience many bugs. So far, restoring the wallet from masterseed has never been necessary, but we offer no guarantees.
To build everything from source, simply checkout the source and build using gradle on the build system you need:
- JDK 1.8
The project layout is designed to be used with a recent version of Android Studio (currently 4.1.2)
To get the source code, type:
git clone https://github.com/mycelium-com/wallet-android.git cd wallet-android git submodule update --init --recursive
./gradlew clean test mbw::assembleProdnetRelease mbw::assembleBtctestnetRelease
gradlew.bat clean test mbw::assembleProdnetRelease mbw::assembleBtctestnetRelease
- Voila, look into
mbw/build/outputs/apk/to see the generated apk. There are versions for both prodnet and testnet.
Alternatively you can install the latest version from the Play Store.
If you cannot access the Play store, you can obtain the apk directly from the Mycelium Bitcoin Wallet download page.
App Download Verification
All versions released by Mycelium are signed with the same release keys. If you do not trust the apk you can check that signature with apksigner:
apksigner verify --print-certs --verbose mycelium.apk
The output should look like:
Verifies Verified using v1 scheme (JAR signing): true Verified using v2 scheme (APK Signature Scheme v2): true Verified using v3 scheme (APK Signature Scheme v3): false Number of signers: 1 Signer #1 certificate DN: CN=Mycelium Developers, O=Mycelium, L=Vienna, C=AT Signer #1 certificate SHA-256 digest: b8e59d4a60b65290efb2716319e50b94e298d7a72c76c2119eb7d8d3afac302e Signer #1 certificate SHA-1 digest: be575ec3b3b52e0b2392146cbdb245c91ef5a04f Signer #1 certificate MD5 digest: 7aec063675b0206aba3b6175b89abc7d Signer #1 key algorithm: RSA Signer #1 key size (bits): 2048 Signer #1 public key SHA-256 digest: 6d9c0cda9dcd3ec5efcdca41243829b1dcf1e9a91c6309bca167807282590a20 Signer #1 public key SHA-1 digest: b34336038c7ca678285c14aebe78b7d5add90e4c Signer #1 public key MD5 digest: a78bdb2b6d074db4b1ff12eb9cddcfa3 WARNING: ...
To validate the Mycelium image you obtain from Google Play Store, you can rebuild the Mycelium wallet yourself using Docker and compare both images following these steps:
Get the source as above
Create your own Docker image from our simple Dockerfile
$ docker build . --tag mycelium-wallet
Check that this step succeeds by listing the available docker images:
$ docker images | grep mycelium-wallet
Use disorderfs to eliminate non-determinism caused by file ordering
$ mkdir /tmp/s $ sudo disorderfs --sort-dirents=yes --reverse-dirents=no --multi-user=yes $PWD /tmp/s $ cd /tmp/s
Build Mycelium using Docker
$ docker run --rm --volume $(pwd):/project --workdir /project -it mycelium-wallet bash # yes | /opt/android-sdk/tools/bin/sdkmanager "build-tools;28.0.3" # ./gradlew clean :mbw:assProdRel
If you see errors about local paths not being found, remove/move away
local.properties. Run the mycelium-wallet docker with gradle compilation of mbw. As docker might run as a different user, its generated files will also be "not yours". Make them yours using
chownas super user.
The app can now be found in
As maintainer with release keys you want to run a slightly different command: Add these docker parameters:
--volume 'path/to/keys.properties':/project/keys.properties --volume 'path/to/keystore_mbwProd':/project/keystore_mbwProd --volume 'path/to/keystore_mbwTest':/project/keystore_mbwTestBuild all these targets
:mbw:assBtctRel :mbw:assProdRel :mbw:assBtctDeb :mbw:assProdDeband to get an error on missing release keys, add this gradle option
Note: for those who use Docker Toolbox $(pwd) should be under your home user folder since this is the only folder that is shared with VM.
Retrieve Google Play Mycelium APK from your phone Gets package path:
$ adb shell pm path com.mycelium.wallet package:/data/app/com.mycelium.wallet-1/base.apk
$ adb pull /data/app/com.mycelium.wallet-1/base.apk mycelium-signed.apk
Extract content from both apks you want to compare, using ApkTool:
java -jar ~/path/to/apktool.jar d mbw-prodnet-release.apk java -jar ~/path/to/apktool.jar d mycelium-signed.apk
Compare signed apk with unsigned locally built apk using a diff tool
diff --brief --recursive mbw-prodnet-release/ mycelium-signed/ | grep -v "META-INF/CERT.RSA\|META-INF/CERT.SF\|META-INF/MANIFEST.MF"
The expected difference between these files are elements that depend on the signature, that only the project's maintainer can reproduce:
With the Mycelium Bitcoin Wallet you can send and receive Bitcoins using your mobile phone.
- HD enabled - manage multiple accounts and never reuse addresses (Bip32/Bip44 compatible)
- Masterseed based - make one backup and be safe for ever. (Bip39)
- 100% control over your private keys, they never leave your device unless you export them
- No block chain download - install and run in seconds
- Ultra fast connection to the Bitcoin network through our super nodes
- For enhanced privacy and availability you can connect to our super nodes via a tor-hidden service ( .onion address)
- Watch-only addresses (single or xPub) & private key (single or xPriv) import for secure cold-storage integration
- Directly spend from paper wallets (single key, xPriv or master seed)
- Trezor enabled - directly spend from trezor-secured accounts.
- Mycelium Entropy compatible Shamir-Secret-Shared 2-out-of-3 keys spending
- Secure your wallet with a PIN
- Compatible with other bitcoin services through the
Please note that bitcoin is still experimental and this app comes with no warranty - while we make sure to adhere to the highest standards of software craftsmanship we can not exclude that the software contains bugs. Please make sure you have backups of your private keys and do not use this for more than you are willing to lose.
- Sources available for review
- Multiple HD accounts, private keys, external xPub or xPriv accounts
- Multiple Bitcoin denominations: BTC, mBTC, bits and uBTC
- View your balance in multiple fiat currencies: USD, AUD, CAD, CHF, CNY, DKK, EUR, GBP, HKD, JPY, NZD, PLN, RUB, SEK, SGD, THB, and many more
- Send and receive by specifying an amount in fiat and switch between fiat and BTC while entering the amount
- Address book for commonly used addresses
- Transaction history with detailed information and local stored comments
- Import private keys using SIPA (the ones beginning with a 5) and mini private key format (Casascius private keys) from QR-codes or clipboard
- Export private-, xPub- or xPriv-keys as QR-codes, on clipboard or share with other applications
- Share your bitcoin address using Twitter, Facebook, email and more.
- Integrated QR-code scanner
- Client side load balancing between three 100% redundant server nodes located in different data centers.
- Sign Messages using your private keys (compatible with bitcoin-qt)
- Jan Møller
- Andreas Petersson
- Daniel Weigl
- Jan Dreske
- Dmitry Murashchik
- Constantin Vennekel
- Leo Wandersleb
- Daniel Krawisz
- Jerome Rousselot
- Nelson Melina
- Elvis Kurtnebiev
- Sergey Dolgopolov
- Sergey Lappo
- Alexander Makarov
- Nadia Poletova
- Kristina Tezieva
- Nuru Nabiyev
Thanks to all collaborators who provided us with code or helped us with integrations! Just to name a few:
- Nicolas Bacca from Ledger
- Sipa, Marek and others from Trezor
- Jani and Aleš from Cashila
- Kalle Rosenbaum, Bip120/121
- David and Alex from Glidera
- Wiz for helping us with KeepKey
- Tom Bitton and Asa Zaidman from Simplex
- (if you think you should be mentioned here, just notify us)
Thanks to Jethro for tirelessly testing the app during beta development.
Thanks to our numerous volunteer translators who provide high-quality translations in many languages. Your name should be listed here, please contact me so I know you want to be included.
Thanks to Johannes Zweng for his testing and providing pull requests for fixes.
Thanks to all beta testers to provide early feedback.